Dont forget Faster Harder and More Challenging Q-Bert (sqbert). This was an unreleased version designed by the original Q-Bert arcade. It was never released but was designed for the enthusists who asked for "Faster, and make it harder... challenging too" so he did just that.
He released it himself (as he had the only arcade with the roms at home) I believe.
> Q-Bert and Q-Bert Qubes (Which you *could* refer to as being Q-Bert 2 - As it is
> the official sequel to Q-Bert) were the only Arcade Released titles.